Buggy code:
public class ProxyAccess { private static WeakHashMap < IBlockAccess , IBlockAccess > cache = new WeakHashMap ( ) ; private static World tmpCache ; private static boolean worldInstanciationFailed = false ; private interface IProxyAccess { public Block getBlock ( int x , int y , int z ) { } public TileEntity getTileEntity ( int var1 , int var2 , int var3 ) { } public int getBlockMetadata ( int x , int y , int z ) { } public boolean setBlockMetadataWithNotify ( int x , int y , int z , int metadata , int flag ) { } public boolean setBlock ( int x , int y , int z , Block block , int metadata , int flag ) { } public WorldInfo getWorldInfo ( ) { } public WorldInfo getSeed ( ) { } public void calculateInitialSkylight ( ) { } public void calculateInitialWeatherBody ( ) { } } public static IBlockAccess get ( IBlockAccess world ) { if ( world == null ) return null ; IBlockAccess proxy = ProxyAccess . cache . get ( world ) ; if ( proxy == null ) { if ( world instanceof World ) { if ( ProxyAccess . worldInstanciationFailed ) return world ; try { ProxyAccess . tmpCache = ( ( World ) ( world ) ) ; proxy = new ProxyAccess . ProxyWorld ( ( ( World ) ( world ) ) ) ; ProxyAccess . tmpCache = null ; } catch ( Exception e ) { <START_BUG> log . error ( "[ProxyAccess]<seq2seq4repair_space>Proxy<seq2seq4repair_space>wold<seq2seq4repair_space>instanciation<seq2seq4repair_space>failed<seq2seq4repair_space>:<seq2seq4repair_space>{}<seq2seq4repair_space>" , e ) ; <END_BUG> ProxyAccess . worldInstanciationFailed = true ; return world ; } } else proxy = new ProxyAccess . ProxyBlockAccess ( world ) ; ProxyAccess . cache . put ( world , proxy ) ; } return proxy ; } public static VanishingTileEntity getVanishingTileEntity ( IBlockAccess world , int x , int y , int z ) { } public static Block getBlock ( IBlockAccess world , int x , int y , int z ) { } public static int getMetadata ( IBlockAccess world , int x , int y , int z ) { } public static TileEntity getTileEntity ( IBlockAccess world , int x , int y , int z ) { } private static class ProxyBlockAccess implements IBlockAccess { @ Delegate ( excludes = ProxyAccess . IProxyAccess . class ) public IBlockAccess original ; public ProxyBlockAccess ( IBlockAccess world ) { } @ Override public Block getBlock ( int x , int y , int z ) { } @ Override public TileEntity getTileEntity ( int x , int y , int z ) { } @ Override public int getBlockMetadata ( int x , int y , int z ) { } } private static class ProxyWorld extends World { @ Delegate ( excludes = ProxyAccess . IProxyAccess . class ) public World original ; public ProxyWorld ( World world ) { } @ Override public Block getBlock ( int x , int y , int z ) { } @ Override public TileEntity getTileEntity ( int x , int y , int z ) { } @ Override public int getBlockMetadata ( int x , int y , int z ) { } @ Override public boolean setBlock ( int x , int y , int z , Block block , int metadata , int flag ) { } @ Override public boolean setBlockMetadataWithNotify ( int x , int y , int z , int metadata , int flag ) { } @ Override protected IChunkProvider createChunkProvider ( ) { } @ Override public WorldInfo getWorldInfo ( ) { } @ Override public long getSeed ( ) { } @ Override public void calculateInitialSkylight ( ) { } @ Override public void calculateInitialWeatherBody ( ) { } @ Override protected int getRenderDistanceChunks ( ) { } } No newline ; at end ; of file ; }

Fix:
log . error ( "[ProxyAccess]<seq2seq4repair_space>Proxy<seq2seq4repair_space>wold<seq2seq4repair_space>instanciation<seq2seq4repair_space>failed<seq2seq4repair_space>:" , e ) ;